As a person who lives inside a city: hell yes they should be quiet instead of sounding like an ICE. As a person who own a Prius: I'd think about the OPTION of

As a person who lives inside a city: hell yes they should be quiet instead of sounding like an ICE. As a person who own a Prius: I'd think about the OPTION of installing something to make noise, as I have had pedestrians almost get hit and I've had several cyclists hit me. Something as LOUD as a normal car though? No.